Re: Got the V2000 HV blues...

Total Impulse wrote:
> After two months, I'm still fighting with this 15V2000. I've gone
> through it and can't figure out the root cause of its issue.
>
> It was up and running yesterday for at least 5 hours, sitting on the
> floor next to the game. Today, I reinstalled it in the game, and it
> kept working fine. Then, I installed the back door on the cabinet,
> and 30-45 minutes later, the monitor was dark. F102 was blown again.
>
> Conjecture - with the door on, the temperature inside the cabinet
> rises, and something on the HV board becomes unhappy. Any ideas?
> (other than installing a cooling fan?)
>
> I've replaced all the semiconductors with the exception of Q900 &
> Q903. I swapped in a different HVT. I replaced R905 HV adjust pot.
> I've replaced all the caps with the exception of Q903, 908, 909, 910.
> That leaves those few exceptions and the resistors. I've checked all
> the resistors, but could one be heating up and only then going open or
> shorted?
>
> I suppose that I can start replacing resistors... #sigh#
> Does R900 (21 ohm, 15 watt wire wound) need to be non-inductive?
>
> ARGH!
>
> Thanks,
>
> Alan

If your monitor uses the (801 - Electrohome) HV doubler they do tend to
fail...or if not, the HV diode can become defective and start
overheating - drawing too much current leading to fuse failure. If you
have a remote temperature probe monitor the HV parts to see if any
start to heat up, or if the rubber end caps on the HV diode are
black/melted then the diode may be bad (or just old rubber from previous
bad diode).

You can replace the doubler through:
http://www.arcadesolution.com/801cage.html

Note that the 2CL2FM diodes are rated at 20KV and can replace the
regular HV diodes as well...

John :-#)#
>
> Total Impulse wrote:
>>
>> Trying to wrap up restoration of an Asteroids Deluxe mini, and the HV
>> board in the 15V2000 is giving me fits. (When I bought this game,
>> the monitor was kaput.)
>>
>> Went through monitor, installed cap kit and new deflection
>> transistors. Replaced all header pins instead of just resoldering
>> them. Monitor came up fine, adjusted it, had a great picture. Left
>> the game running, came back after about an hour to find the monitor
>> dark. Quick check, no high voltage, F102 on the deflection board was
>> blown.
>>
>> Pulled the HV cage. Checked all the resistors (seemed fine, didn't
>> replace any) Did a shotgun replace of Q901, D900, D901, D902, ZD900,
>> ZD901, ZD902. (Caps C900, C901, C904, C907 replaced previously.)
>> Pulled the HV diode, thoroughly cleaned up the connectors, installed
>> a new diode with fresh dielectric grease.
>>
>> Powered up the monitor and checked the HV over 15+ minutes. Adjusted
>> for 14.5kv.
>>
>> Powered up game, monitor worked and looked great. Left it running
>> and within roughly an hour it had gone dark again. F102 blown. #sigh#
>>
>> I should replace the HV adjustment pot as it seemed a bit flaky, but
>> I don't have an appropriate 5k pot on hand.
>>
>> Any ideas or recommendations?
>>
>> Thanks,
>>
>> Alan
>
>

-- 
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
                 www.flippers.com 
"Old pinballers never die, they just flip out"
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